Joint-fitting for truss structures.



I. w. MILLER- UKM' FITTWOFUR TRUSS STRUCTURES. nrucmou min mu 3.12mi.

1,284,919. Patented Nov. 12,1918.

3! 14 new 01 John W. l fillelfl UNITED STATES Y PATENT OFFICE.

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To all 107mm. it may concern: I

Be itknown that Joan W. Minus, a

citizen of the United totes, and resident of the city of Seattle, county of 1 King, and State of washinlgton, have invented certain new and useful' mprovements in 'Joint-Fittings for Truss Structures, of which the fol lowing is a specification. =My invention relates tea fitting which is inlended for use in connecting up the various members of a trussed structure, as for instance the'fuselage of an acre lane. The objectof my invention is to provide a fitting for "such oints which shall be light in weight, strong, and which provides means :for attachment of the tension members of the trussed structure as well as means for efiiciently takin care of the compression strains from t e thrust members of the trussed structure.

The features of my invention which I consider to be novel-and upon which I desire a patent will be described, and then particularly defined in the claims; The accompanying drawings show the type of construction which I now prefer to use.

Figure 1 showsa face view of the fitting, lookin in a direction substantially parallel with t e axis of one of the longitudinal memners of the trussed structure.

Fig. 2 is an edge view looking in a direction substantially erpendicular to the axis of the member a out which the clip is placed. I,

Fig. 3 is a face view of the fixture. the line of view being substantially parallel with the second thrust member which it is designed to accommodate.

Figs. 1 and 3 are in each case views taken of the fitting as shown in Fig. 2 from the directionin whichsaid Figs. 1 and 3 are lo cated. This fitting is designed. for use in such locations where a lon tudinal member has twothrust members joining the same at a proximately rig t angles thereto and at which point it is also desired to secure tension members.

The fitting is composed of essentially three stampings which are preferably integrally joined together so as to form 9 slngle completed member. Thebese of this fitting consists of a plate, 1, which is bent about one of the bars of a trussed structure. As herein shown this bar is of a square cross sectioii. 55 The ends of this encircling plate or bar, 1,

, mmmmmn Patented Nov. 12, 191s. Application filed M178 1918. lerlal lo. we.

terminate in two cars, 10, preferably at one (firmer of the square formed by the trussed r At the side of the fitti where it is .desued to oin a thrust 'mem r, as bar 7,'the

plate from which the encircling band, '1, is

made has four ears. 2. of a general triangular s a stamped therefrom and p outwar l'yi thus formin a soeket fortherev ac tion of the ends of t a thrust bars, 7.

t has been found that if the thrust bars, 7, are permitted to bear directly u n the longitudinal bar, 6, which bars in t construction of fuselages of aeroplanes are enerally made of wood, the end graiir the thrust bars, 7, has a tendency to compress and seat itself into the side grain of the longitudinal bar, 6. It is, therefore, desirable, if not necessary, to provide something of the natureof a washer or thrust late, between the ends of the bars, 7, and the bar, 6. It is also desirable to provide a fitting of this character with means for securing ten- 7 men members, as wires, thereto. 1 accomplish both of these results by the following means:

I secure a plate as 3 to the inner surface of these sides of the fitting ihis being preferably secured by spot welding, or brazing. or by both. This closes the hole which has been made in the band, 1, by stamping out the ears, 2. and thus furnishes a surface against which the ends of bars, 7, ma bear and thus prevents their injuring the ar, 6, about which the fittin is placed. This plate is also provided witii a hole 31, centrally positioned in the socket for the reception of a screw which enters the bar or strut 10 "seated in said socket, thus securing it against bein pulled outward.

T ese plates, 3, are also provided wit cars, 30, extending beyond the edges of the strap, 1, and eachprovidcd with a hole so thiit tension members may be connected therewith. in the fitting as shown'in the drawings, provision has been made for seatin two bf the thrust members, 7, upon two a acent sides of the fitting. It is evident that the same provision might be made at the other sides, if, for any reason, this should be necessary.

The use of the plates, 3,'in the manner de- Ill scribed rovides four pliices for the attach- A nient o the tension rods. A fifth lace is provided by the two cars, 10, whic 11.

B theends of the strap, 1, by which the fitting securely bound upon the bar, 6. A fittin r sheet stee weight. It is also of reliable and dependable character, no to contain flaws which will result in breakage in use. It can also be cheaply made an has many points of superiority over any cast fitting.

What I claim as my 1. A joint fitting for prising a band shaped having ears cut to form receiving sockets for struts, an thrust plates secured to the inner surface 0 said band to cover said sockets.

2. A joint fitting for truss structures con}- prising a band shape to fit about a bar an invention is: I truss structures commums having ears to form a plate secured to the inner surface of th band to receiving cover an socket, said Y plates from beneath the band an 3 A joint fitting prising cut therefrom and bent outward sockets for struts, an

a form a bottom for said having ears promoting adapted to form for a truss mem r.

for truss structures comfit about a beam 0 nd having ears cut therein an i 0 form a socket for a strut and a bearing plate secured to the inner surface of san having a sore socket.

Signed at Seattle,

day of J une, 1918.

(1 band to cover w receiving the socket an hole within the Washington, this 27th J OHN W. MILLER. 

